EP 0128091 A1 19841212 - Guiding device for the control bundels of nuclear reactors.
Title (en)
Guiding device for the control bundels of nuclear reactors.
Title (de)
Vorrichtung zur Führung der Steuerbündel von Kernreaktoren.
Title (fr)
Dispositif de guidage des grappes de contrÔle de réacteurs nucléaires.
Publication
Application
Priority
FR 8309275 A 19830603
Abstract (en)
[origin: EP0128091B1] 1. Nuclear reactor comprising : a core consisting of fuel assemblies located side-by-side and cooled by an upward flow of a cooling fluid ; clusters for controlling the nuclear reactor each formed of a plurality of absorbing rods (8) vertically movable and connected together by a spider having radially directed arms to a common axial drive shaft, the rods having such a distribution that some of them are located as pairs of two rods radially aligned with respect to the axis of the cluster ; and devices for guiding the control clusters during their movements above the core, each having a guide casing within which horizontal plates achieve discontinuous guiding of the absorbing rods of the control cluster in the upper part of the casing (11), characterized in that, in the lower portion of each casing (11), those absorbing rods (8) which are arranged in pairs are mechanically guided on their periphery by the horizontal plates (14) only and in that each pair is surrounded by an envelope (22) each connecting two plates, defining a cooling fluid steadying space around said absorbing rods and decreasing the hydraulic actions onto the rods.
Abstract (fr)
L'invention se rapporte à un dispositif de guidage des grappes de contrôle constituées de plusieurs crayons absorbants. Il est prévu des boitiers de guidage respectivement associés aux différentes grappes de contrôle et, à l'intérieur de chaque boitier, des plaques horizontales (14) assurant, dans la partie haute, un guidage discontinu à des niveaux intermédiaires pour les différents éléments de la grappe de contrôle. Dans la partie basse des boitiers, le guidage des crayons absorbants positionnés par couples sur un rayon, est réalisé par l'association des plaques horizontales (14) assurant le guidage mécanique des crayons avec des carters (22) qui minimisent les effets hydrauliques par le transquilisation du fluide de refroidissement dans le sens radial outour desdits crayons absorbants. Application aux réacteurs nucléaires à eau pressurisée.
IPC 1-7
IPC 8 full level
G21C 7/10 (2006.01); G21C 7/117 (2006.01)
CPC (source: EP KR US)
G21C 7/10 (2013.01 - KR); G21C 7/117 (2013.01 - EP US); Y02E 30/30 (2013.01 - EP US)
Citation (search report)
- [A] EP 0060778 A1 19820922 - FRAMATOME & CIE [FR]
- [A] EP 0079828 A1 19830525 - FRAMATOME & CIE [FR]
- [A] FR 2399715 A1 19790302 - WESTINGHOUSE ELECTRIC CORP [US]
- [A] FR 1560777 A 19690321
- [A] FR 2254859 A1 19750711 - COMMISSARIAT ENERGIE ATOMIQUE [FR]
- [A] FR 2397043 A1 19790202 - WESTINGHOUSE ELECTRIC CORP [US]
Designated contracting state (EPC)
AT BE CH DE GB IT LI SE
DOCDB simple family (publication)
EP 0128091 A1 19841212; EP 0128091 B1 19880127; AT E32282 T1 19880215; DE 3469088 D1 19880303; FR 2547100 A1 19841207; FR 2547100 B1 19850830; KR 850000728 A 19850309; KR 910005805 B1 19910803; US 5006305 A 19910409; ZA 843847 B 19850424
DOCDB simple family (application)
EP 84401117 A 19840530; AT 84401117 T 19840530; DE 3469088 T 19840530; FR 8309275 A 19830603; KR 840003085 A 19840602; US 61723084 A 19840604; ZA 843847 A 19840522